Basal soil respiration is an important factor to influence soil organic carbon dynamics in the terrestrial ecosystem. Soil respirations were measured with the automated CO₂ flux system (Li-8100,) in a long-term bare soil in the Changwu State Key Agro-Ecosystem Experimental Station (35° 12' N, 107° 40' E), Shaanxi, China from March 2009 to November 2011. Soil temperature and soil moisture at the 5-cm depth was measured using a Li-COR thermocouple and oven drying method, respectively. Significant variations in seasonal and annual soil respiration were observed in the experimental period of three years. Soil respiration averaged at 1.16 μmol·m^-2·s^-1, 0.92 μmol·m^-2·s^-1 and 0.88 μmol·m^-2·s^-1 in 2009, 2110 and 2011, respectively. The cumulative soil respiration in 2009, 2010, and 2011 soil were 282 g C/m², 234 g CO₂/C m² and 230 g C/m², respectively. The soil respiration was significantly related with seasonal soil temperature or soil moisture. A bivariate model more accurately soil respiration in the bare soil ecosystem than a univariate model with only soil temperature or soil moisture as the driver. During the experimental period of three years, the accumulation of soil respiration in bare soil was negative correlation with annual precipitation, whereas there was no relationship between soil respiration and annual air temperature. In the bare soil, the annual loss of carbon was estimated at 2.5 Mg/hm² according to soil respiration.